diff --git a/onnxscript/ir/_core_test.py b/onnxscript/ir/_core_test.py
index 2af10646de..6f81feb7a6 100644
--- a/onnxscript/ir/_core_test.py
+++ b/onnxscript/ir/_core_test.py
@@ -1314,6 +1314,16 @@ def test_take_inputs(self):
         self.assertIs(self.value2.graph, self.graph)
         self.assertIsNone(self.value3.graph)
 
+    def test_inputs_copy(self):
+        self.graph.inputs.extend([self.value1, self.value2])
+        inputs_copy = self.graph.inputs.copy()
+        self.assertEqual(inputs_copy, [self.value1, self.value2])
+        self.assertIsNot(inputs_copy, self.graph.inputs)
+        # Modifying the copy does not affect the original
+        inputs_copy.append(self.value3)
+        self.assertNotIn(self.value3, self.graph.inputs)
+        self.assertIn(self.value3, inputs_copy)
+
     def test_append_to_outputs(self):
         self.graph.outputs.append(self.value2)
         self.assertIn(self.value2, self.graph.outputs)
@@ -1423,6 +1433,16 @@ def test_take_outputs(self):
         self.assertIs(self.value2.graph, self.graph)
         self.assertIsNone(self.value3.graph)
 
+    def test_outputs_copy(self):
+        self.graph.outputs.extend([self.value1, self.value2])
+        outputs_copy = self.graph.outputs.copy()
+        self.assertEqual(outputs_copy, [self.value1, self.value2])
+        self.assertIsNot(outputs_copy, self.graph.outputs)
+        # Modifying the copy does not affect the original
+        outputs_copy.append(self.value3)
+        self.assertNotIn(self.value3, self.graph.outputs)
+        self.assertIn(self.value3, outputs_copy)
+
     def test_set_initializers(self):
         self.graph.initializers["initializer1"] = self.value3
         self.assertIn("initializer1", self.graph.initializers)
diff --git a/onnxscript/ir/_graph_containers.py b/onnxscript/ir/_graph_containers.py
index 620e73e86b..9aab17d006 100644
--- a/onnxscript/ir/_graph_containers.py
+++ b/onnxscript/ir/_graph_containers.py
@@ -90,6 +90,11 @@ def clear(self) -> None:
             self._maybe_unset_graph(value)
         super().clear()
 
+    def copy(self) -> list[_core.Value]:
+        """Return a shallow copy of the list."""
+        # This is a shallow copy, so the values are not copied, just the references
+        return self.data.copy()
+
     def __setitem__(self, i, item) -> None:
         """Replace an input/output to the node."""
         if isinstance(item, Iterable) and isinstance(i, slice):
@@ -124,7 +129,6 @@ def _unimplemented(self, *_args, **_kwargs):
     __iadd__ = _unimplemented
     __mul__ = _unimplemented
     __rmul__ = _unimplemented
-    copy = _unimplemented
 
 
 class GraphInputs(_GraphIO):